For close to four decades, the members of Big Head Todd and The Monsters — Todd Park Mohr (vocals, guitar, keys, sax, harmonica), Brian Nevin (drums), Rob Squires (bass, vocals) and Jeremy Lawton (keyboards, lap pedal/steel guitar, vocals) — have continued to both throw down in the studio and light up stages worldwide. Don't miss them at the Lowell Summer Music Series at Boarding House Park in downtown Lowell. Tickets start at $60.